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Loans Receivable, Net - Summary of Changes in Accretable Yield (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Allowance for Loan and Lease Losses [Roll Forward]    
Beginning balance $ 749 $ 75
Accretion (162) (9)
Reclassification from non-accretable difference 106 0
Ending balance $ 693 $ 66